981814663 has 2 divisors, whose sum is σ = 981814664. Its totient is φ = 981814662.

The previous prime is 981814661. The next prime is 981814667. The reversal of 981814663 is 366418189.

981814663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981814663 - 2¹ = 981814661 is a prime.

Together with 981814661, it forms a pair of twin primes.

It is equal to p_49969207 and since 981814663 and 49969207 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981814661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490907331 + 490907332.

It is an arithmetic number, because the mean of its divisors is an integer number (490907332).

Almost surely, 2^981814663 is an apocalyptic number.

981814663 is a deficient number, since it is larger than the sum of its proper divisors (1).

981814663 is an equidigital number, since it uses as much as digits as its factorization.

981814663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 981814663 is about 31333.9219217767. The cubic root of 981814663 is about 993.9011000387.

The spelling of 981814663 in words is "nine hundred eighty-one million, eight hundred fourteen thousand, six hundred sixty-three".